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Our Complete range of products are QT (Quarter Turn Actuators), Damper and Electric Actuator Stockists.

QT (Quarter Turn Actuators)

The various Types of electrical Actuators from Marsh have been developed specially for the quarter turn operation of small size Butterfly, Ball, Plug valves and dampers. Thanks to their design simplicity to achieve low-cost automation. They are provided with single phase motors which considerably saves the cost of electrical hardware and other accessories.

Also as the actuators are installed directly on final control element and are provided with stall-duty motors, the units become completely maintenance free, that is Fit and Forget type. The units are supplied with all necessary features to operate the final control element in ON/OFF or modulating modes.

STANDARD
  • Limit Switches (1No.+1Nc) - 2 Nos. (Rating 10 A - 250 VAC)
  • Hand wheel
  • Local position indicator
  • Adjustable mechanical stoppers
OPTIONAL
  • Auxillary limit switches - (1No + 1Nc) - 4 Nos.
  • Torque limit switches (1No + 1Nc) - 2 Nos (for QT10 onwards)
  • Three position switch for ON/OFF operation Field/Panel mounted
  • Feed back Potentiometer
  • Valve positioner - Field / Panel mounted Input : 4-20mA/0-10 V DC.Output : Proportional
  • Two wire transmitter field /Panel mountedInput : From potentiometer in actuator - 100 to 235 ohms or 0-1000 ohmsOutput : 4-20 mA - Two wire
  • IP 67 Protection
  • Remote position indicator-Digital
  • Space heater
  • Special accessories on request

 

Actuator Data Actuator Models
  QT-3 QT-5 QT-10 QT-20 QT-30 QT-40 QT-50
Rated Output Torque Kgm 3 5 10 20 30 40 50
Operating Speed Sec /90° 17 17 20 20 26 26 26
Switching Frequency
Operations / Hour
a) Short Time
b) Normal


1200
600
Weight Kg. 14 15 27 28 38 40 42
Degree of Protection IP65/IP67
Area of Operation Safe
Motor Data  
Type Non-Blocking A. C. Motor
Supply : Standard
            Optional
220V AC 50Hz Single Phase
110 V AC 50Hz Single Phase
Output wattes 90 125 175 250 290 300 320
Nominal Current Amp 0.5 0.55 0.9 1.2 1.3 1.4 1.5
Class Insulation F
Ambient Temperature 45° C








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